It's also just sad...the entire point of a democracy is that the citizenry gives the government its power. The government has no license to make itself, even in name if not already in fact, its own sole security in power.
Now, by that same token the citizenry must respect the ruling of the government up to the point where doing so is absolutely impossible to reconcile with basic human decency and intrinsic rights. We're not nearly there yet and likely won't be for a long time, if ever.
But everyone has a right to legitimate self-defense, and a semi-automatic weapon is second to none in terms of accomplishing that.